Go to Auto Zone or Advanced Auto and get a free ECU scan post the codes. As I use my own scanner I'm not sure what capabilities their scanner has. But it's free it's a good place to start.
You can call a few transmission shops and get a quote on a scan.
Get one with a good reputation.
If you know what you need G7 computer repair. They repair about all items on a jeep for $200.00 if mailed to them as it's the same unit it doesn't need reprogrammed.